![]() You can scan for gadgets independently even if the site has no known prototype pollution source. This sent the data to a PHP script which logged the data. The following sample code demonstrates this: params.replace(/\+/g, ' ').split('&').forEach(function(v)) When this happens, it's referred to as a prototype pollution source. This enables an attacker to use property keys like _proto_, which then allows them to create arbitrary assignments to the Object.prototype (or other global prototypes). ![]() It can also occur as a result of an object generated from query/hash parameters, when the merge operation does not sanitize the keys. Prototype pollution is a vulnerability that occurs when you merge an object with a user controlled JSON object. We hope to release some client-side prototype pollution labs on our Web Security Academy in a few months demonstrating the issue but for now here's what you need to know. We've also created another YouTube video to help you use the new features: ![]() If you want to investigate, find, and fix client-side prototype pollution vulnerabilities then you really should read on - to discover how DOM Invader makes your life easier. This year, we've improved DOM Invader to make finding CSPP (client-side prototype pollution) as easy as a couple of clicks. Last year we made it significantly easier to find DOM XSS, when we introduced a brand new tool called DOM Invader. ![]()
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